Re: IDE drive slow, config issue?

From: Andre Hedrick (andre@suse.com)
Date: Sun Mar 12 2000 - 18:08:07 EST


CAKE WALK........

You have ATA-66 drives on an ATA-33 interface and you did not set

CONFIG_BLK_DEV_PIIX=y
CONFIG_PIIX_TUNING=y

On Sun, 12 Mar 2000, David Raufeisen wrote:

> Please excuse this if its a configuration issue:
> The IDE drives i have are showing ~4-5MB/sec with hdparm in 2.3.51, they usually
> show 19-21 in kernel 2.2.x
>
> cold:~% /sbin/hdparm -c1 -d1 -k1 -m16 -W1 /dev/hda
>
> /dev/hda:
> setting 32-bit I/O support flag to 1
> setting multcount to 16
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Operation not permitted
> setting keep_settings to 1 (on)
> setting drive write-caching to 1 (on)
> multcount = 16 (on)
> I/O support = 1 (32-bit)
> using_dma = 0 (off)
> keepsettings = 1 (on)
>
> cold:~% uname -a
> Linux cold 2.3.51 #3 Sun Mar 12 11:29:55 PST 2000 i686 unknown
>
> cold:~% hdparm -Tt /dev/hda ; hdparm -Tt /dev/hdb ; hdparm -Tt /dev/sda
>
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 1.03 seconds =124.27 MB/sec
> Timing buffered disk reads: 64 MB in 13.27 seconds = 4.82 MB/sec
>
> /dev/hdb:
> Timing buffer-cache reads: 128 MB in 1.03 seconds =124.27 MB/sec
> Timing buffered disk reads: 64 MB in 15.77 seconds = 4.06 MB/sec
>
> /dev/sda:
> Timing buffer-cache reads: 128 MB in 1.02 seconds =125.49 MB/sec
> Timing buffered disk reads: 64 MB in 4.95 seconds = 12.93 MB/sec
>
> PIIX4: IDE controller on PCI bus 00 dev 39
> PIIX4: not 100% native mode: will probe irqs later
> hd1: C/H/S=0/0/0 from BIOS ignored
> hda: Maxtor 92049U6, ATA DISK drive
> hdb: Maxtor 94098U8, ATA DISK drive
> hdc: TOSHIBA CD-ROM XM-6502B, ATAPI CDROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: Maxtor 92049U6, 19544MB w/2048kB Cache, CHS=39709/16/63
> hdb: Maxtor 94098U8, 39082MB w/2048kB Cache, CHS=79406/16/63
> hdc: ATAPI 40X CD-ROM drive, 256kB Cache
> Uniform CD-ROM driver Revision: 3.07
> Partition check:
> hda: hda1
> hdb: [PTBL] [4982/255/63] hdb1
>
> --
>
> David Raufeisen (davidr@linux.com)
> Project Development Manager -- Linux.com
>
> -
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>

Andre Hedrick
The Linux ATA/IDE guy

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